GLSA 201808-02: LinuX Containers user space utilities: Arbitrary file read

http://security.gentoo.org/

Severity:	low
Title:	LinuX Containers user space utilities: Arbitrary file read
Date:	08/22/2018
Bugs:	#662780
ID:	201808-02

Synopsis

A vulnerability has been found in LXC which may allow for arbitrary file access (read-only).

Background

LinuX Containers user space utilities.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-emulation/lxc	< 3.0.1-r1	>= 3.0.1-r1	All supported architectures

Description

lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn’t otherwise be able to reach.

Impact

A local unprivileged user could use this flaw to access arbitrary files, including special device files.

Workaround

There is no known workaround at this time.

Resolution

All LXC users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-emulation/lxc-3.0.1-r1"

References

CVE-2018-6556

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201808-02.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.